No idea, but the "system" file in your CONFIG dir is your HKLM\SYSTEM registry hive, so unless you've got a backup (try "Last usable configuration that worked" on the F8 boot menu) then your system is hosed.

I am facing the problem very often especially at one specific location...

As mentioned in the previous post.. I also suspected the hardware and now we have changed the complete hardware (infact did it quite a few times).

The same hardware is running in my office perfectly fine. I have put the machine on the raw power and left it running for few days. It works even when the machine is abnormally switch off (due to power loss) multiple time in a day.

Where as when the same machine with same configuration is running in the field it carshes very offten with the error messages similar to "C:\Windows\System32\Config\System is missing or corrupt".

At times I am able to recover the disk from the crash.

I am basically looking for the answer that why does this machine crashes, where as we do abnormal swtich off (without proper shutdown) of the PCs in office / home, they don't crash. They why this machine.